CAJ | 학술논문

针对恶劣天气条件下，广域信息同步困难以及信息缺失的情况，提出一种基于线路故障函数的区域后备保护方案。首先，计及天气因素的影响，利用贝叶斯定理量化距离保护动作时的线路故障概率；然后，将量化的故障概率定义为距离保护对线路的可信度，并作为权重建立距离保护动作信息的线路故障函数；最后，利用线路故障函数在正常与故障情况下的取值差异，构造了具备容错性的故障识别判据。新英格兰10机39节点系统和陕西330kV 电网的仿真结果表明，该方案在距离保护动作信息缺失或有误的情况下，仍能准确定位，且不受系统数据不同步的影响。
침대악렬천기조건하，엄역신식동보곤난이급신식결실적정황，제출일충기우선로고장함수적구역후비보호방안。수선，계급천기인소적영향，이용패협사정리양화거리보호동작시적선로고장개솔；연후，장양화적고장개솔정의위거리보호대선로적가신도，병작위권중건립거리보호동작신식적선로고장함수；최후，이용선로고장함수재정상여고장정황하적취치차이，구조료구비용착성적고장식별판거。신영격란10궤39절점계통화협서330kV 전망적방진결과표명，해방안재거리보호동작신식결실혹유오적정황하，잉능준학정위，차불수계통수거불동보적영향。
In view of the problem that wide-area information is difficult to be synchronized and eas-ily missed in adverse weather conditions,a regional backup protection scheme has been presented based on the fault factor of transmission lines (FFOTL).Firstly,considering the impact of weather factors,the fault probability of transmission line swas quantified by the Bayes theorem. Then,the quantitative fault probability was defined as the reliability of the lines distance protec-tion,and it was applied as weight to build the fault function of transmission lines.Finally,the fault recognition criterion with fault tolerance was constructed based on the value difference of the fault function on the condition of normal and fault.Simulation results of the new England 10-gen-erator 39-bus system and the ShanXi 330 kV power grid show that the method can locate the fault lines accurately under the situation of lacking or having inaccuracy action information for distance protection,and it is not affected by the non-synchronous in formation.